Is using less pitch on a prop reduces torque?
Is this truck question for real?
If a model helicopter was floating in the cargo bay of the space shuttle, would you have to be concerned about its mass when figuring out how long to fire the rockets in order to accelerated the shuttle to some desired speed. No... until it banged into the side of the bay... then yeah. The trucks the same... except you've got a bunch of air blowing around to complicate matters.
p.s.
Anybody here ever heard of Schroedinger's cat? Now we have a new one, Schroedinger's model helicopter.